CVE-2026-73605
MediumCVSS 5.8Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
SiYuan before version 3.7.4 contains a path traversal vulnerability in the getUniqueFilename endpoint that allows anonymous readers to probe filesystem existence without validation or confinement. Attackers can supply arbitrary absolute paths to determine whether files and directories exist on the host, enabling reconnaissance of the filesystem layout and installed software.
Risk Assessment
The risk is information disclosure about the filesystem and installed software, which can facilitate further attacks. Anonymous users can perform reconnaissance without authentication.
Recommendation
It is recommended to immediately upgrade SiYuan to version 3.7.4 or later. Also restrict access to the getUniqueFilename endpoint for unauthenticated users.
Original NVD description (English source)
SiYuan versions before v3.7.4 contain a path traversal vulnerability in the getUniqueFilename endpoint that allows anonymous readers to probe filesystem existence without validation or confinement. Attackers can supply arbitrary absolute paths to determine whether files and directories exist on the host, enabling reconnaissance of the filesystem layout and installed software.